Controller-operating mechanism.



PATENTED 00T.-1 5, 1907-.

G. T. GROGKER. CONTROLLER OPERATING MECHANISM.

APPLIOATION FILED NOV.29,1905.

ATTuRA/m UNITED sT r s Parana oF roE;

CLARENCET. OROOKER, 0F NORWOOD, oHIo, ASSIGNOR TO THE BULLOCK ELECTRIC MANUFACTURING COMPANY, A CORPORATION or oruo.

1 CONTROLLER-OPERATING MECHANISM.

Specification of Letters Patent.

Patented Oct. 15, 1907.

Application filed November 29,1905. Serial No. 289,554.

of Hamilton and State of Ohio, have invented'certain new and useful Improvements in Controller-Operat ing Mechanism, of which the following is a full, ,plear, and exact specification.

This invention relates to improvements in the operating means of electric motor controllers, particularly to those adapted for use in connection with elecprevent an unnecessary waste of current in starting.

In carrying out my inventipn, I provide within the casing of a controller, a ratchet mechanism, one member of which is mounted on the shaft, the parts of said mechanism being so arranged and constructed that only a step-by-step forward movement of the handle is permitted.

More specifically considered, my invention consists in the combination of a controller casing, a handle extending therethrough, a ratchet plate mounted on the shaft within the casing, a pawl supported on a stationary member and adapted tocngage the teeth of the plate, and a spring bearing on the pawl, the parts being so constructed, that when the handle'is moved backward, the pawl will be moved from one tooth to a position to'be engaged by the next adjacent tooth when the handle is moved forward.

- My invention still further consists in the details of construction, and arrangements and combinations of parts described in the specification and set forth in the appended claims. I

For a better understanding of my invention, reference is had to the accompanying drawing, in which Figure 1 is a top'plan view of a controller embodying my invention, parts being broken away for the sake of clcarness; Fig. 2 is an elevation of the upper part of.

the controller, parts being broken away to illustrate my invention more clearly; and Fig. 3 is a section through the cap of the controller casing, the mechanism whereby a step-by-step movement is obtained being shown in cl ovation.

Referring now to the figures of the drawing, the controllcr casing 5 is provided with a cap plate or cover can only be moved forward step by step, so as to per mit the motor or motors to speed up to such an extent that a proper counter-'elcctromolive, force is generated tor circuit before the next step oi externalresistance damage clue to current overloads and also an economy is effected in the operation of the system by preventing an unnecessary waste of current in starting the motor or meters. 1 also provide on the shaft 7, directly under the cap 6, a ratchet member which consists preferably of a disk 11 made of copper, brass or other non-magnetic material, on the under face of which is secured the notched disk "or plate 12. Depending from the under side of the cap 6 within the casing are two lugs 13 and 14. These lugs are suitably spaced apart and, support the bridgiig cross-member 15, by screws 16 and 17. The member '15 is preferably made of steel. it is provided with a recess or depression.18, one end of which has two inclined walls 19 and 20, and the opposite end of which has a vertical wall 21. g

'The end of the member 15 adjacent the lug 14 and vertical wall 2], is lower than the opposite end, forming a shoulder'22, the purpose of whichwill be exscrews 23 is a plate 24, which plates form with the mem ber 15 a small compartment or inclosure. Located made preferably of hard steel. This linger rests freely within the compartment. In one position it is adapted to engage the teeth of the ratchet and the incl ined' walls 19 and 20 for limiting the movement of the controller handle, and permitting a step-by-step movement thereof. This finger-is of irregular shape having a comparatively long narrow neck portion 26 at one end, and at the other end an enlarged portion 27 having two inclined surfaces adapted to engage, in one of its positions, the two inclined walls 19 and 20 of the compm'tnmnt in the member 15. Secured at 28 to the under side of the cap 6, is a curved spring 29, the free end of which bears upon the finger 25. i I

The operation of my device will now be explained. When the parts are in the position shown in Fig. 2, the large end of linger-25 engages the inclinedfaces l9 and 20 and the narrow end 26 of the finger is in engagement with'oncltooth ol' the ratchet plate and is out of engagement with the shoulder 22. It is seen that the shape ol the enniging lacesol the finger 25 and the walls 19 and 20 is such that no pressure of the handle tending to move the shaft and drum in the clockwisedirection can result in the movement to the finger 25. Now in order thnt the handle may be moved in a clockwise direction to output a section of resistance, the handle must first be moved in a counter-clockwise direction for a very for a certain amount of external resistance in the mois cut out. Thus the motors are protected against:

plainod. Secured to each side of the member 15 by within this compartment is a ratchet finger or pawl 25,

' when the handle is moved a slight distance ina cou11- opposite side of the tooth with which it was formerly in 7 tion shown in Fig 2.

tions and changes which donot involve a departurefrom the spirit and scope of my invention.

\ within the casing, and hence can-not be tampered with handle to the running position.

backward the pawl will move out of engagement with one tion to be engagredbyihe next adjacent tooth when the short distancmto permit end 26 of the finger to drop out i of engagement with the tooth of the ratchet plate onto l the shoulder 22, and .to "perm it the spring 29 to force the finger to the position shown in Fig. 3. It is seen that tor-clockwise direction, and when the end 26 of finger 25 is released from one of-thc notches and drops down until it engages the shoulder 22 of the member 15, the spring 29 forces the rear end of the finger downward and forward and the end 26 upward and forward to the engagement, asshown'in Fig. 3. It is seen that the handle can now be moved one step in a'clockwisedirection, when the next adjacent tooth will engage the end 26 of thefinger 25 and raise the latter again to the posi- If it is desired to move the handie a step further in the clockwise direction, the same operation must be repeated.

The teeth on the plate 12, are so arranged thatthey do. not interfere with the free-movement of controller handle backward towards the off position.

In the appended claims I aim to cover all modifica- It is seen that the structureis simple, composed of few parts-and hence will not easily get out of order.

Another great advantage is that the mechanism whereby the step-by-step movement is obtained'is all by the operator, who-might desire to quickly throw the Having thus described my invention, what I claim as new-end desire to-secureby Letters Patent'is'z- 1. In combination, a controller shaft, a handle and a notched member carricdthereby, a pawl adapted to engage the notches oi said member, and means for causing snid pawl to engage one of said notches when the "handle is moved forward. and to escape and move'beyond said notch when the handle is moved slightly backward.

In combination, a controller-shaft, a handle mounted on said shaft. a notched member also on said shaft, a pawl adapted to engage the notches on said member, .the parts being so constructed that as the handle ,is moved slightly of the notches into position to. be engaged by another of said notches when the handle is moved forward.

In combination, a controller casingia shaft extending tlieretln-ough, a handle on said slnift without said casing, a ratchet disk carried by said shaft within the casing, a ratchet finger adapted to engage said ratchet teeth, the finger being so mounted and the Iyli'ts being so constructed that when the handle is moved-slightly backward, the finger will move out of engagement with one tooth into posi handle is moved forward. v 6

i. In combination, a controller casing, a shaft extending tireretlirougli and having at its outer end a controller handie, a ratchet plate on said shaft within the casing, a

pawl supported adjacent thereto for engaging the teeth of the ratchet plate, and means for moving said finger out of the path of one tooth into position to be engaged by another-tooth when the handle is moved slightly backward.

In combination, a controller casing, a shaft extending therethrough and having a controller handle on its outer end, a notclied plate mounted on said shaft within the casing, a ratchet finger or pawl movubiy mounted and adapted in one position to engage a tooth offthe ratchet "plate,i1nd

means, when the handle is moved slightly in one direction,

for moving said pawl away. from one tooth to a position for engaging the next adjacent tooth when thehandle is moved in the opposite direction.

(l. in combination, a controller casing, a shaft exteiiding tlierethrough and carrying at its outer end a controller handle and within the casing a notched plate, and a pawl adapted to engage the notches of said plate said pawlbe,

ing supported from the cover or cup of the casing, 'and the parts being so constructed and arranged that when the handle is moved backward a slight distance, the pawl will move out of engagement with one tooth to a position to engagetlie next adjacent tooth when the handle is moved forward. r

, 7. In combination, ,a controller casing, a shaft extending therethrough' and carrying at its outer end a controller handle and within the casing a ratchet plate, a pawl located sdfiacent said plate and adapted to engage the teeth thereof, and a spring bearing on said-pawl and adapted, when the handle is moved slightly backward, to move' the pawl from one tooth to a position to engage the next adjacent tooth when the handle is moved forward.

8. In combination, a controller casing, ashaft extending therethrough, a controller handle mounted on the outer end thereof, a ratchet plate mounted on said shaft within the casing. s pawl supported from the cover of the casing adjacent the ratchet plate end-adapted to engage the teeth thereof to permit a step-bystep movement, and a' spring mounted on the under side of thecapor cover and adapted to move the pawl out of the path of one tooth to n position to be engaged by the adjacent tooth on forward rotation of the handle. 4

9. In a controller for electric motors, the combination of s rotatable shaft, an operating handle therefor, a disk fixed on saidlshaft and having its lower'face' notched to form ratchet teeth, a'stationary support, and an unattsched pawl resting on said support and normally projectingupward into the path of the teeth of said disk.

10. In a controller for electric motors, the combination of n rotatable sheft, an operating handle therefor, a disk dried on said shaft and having its lower face notched to form ratchet teeth, a ststlonury'support, an unattached pawl resting on said supper-Land normally projecting upward into the path of the teeth of said disk, and means for permitting the pnwl to be moved out of the path of said teeth! l in testimony whereof I sfilx my signature, in the presence of two witnesses.

CLARENCE 1. cnocnnn.

W! tnesses ..Fnnp J. KINSEY,

ARTHUB'F. Kwis. 

